membranophone
The electrophone was not in the original Hornbostel-Sachs scheme of musical instruments published in 1914.
In an electrophone, the sound may be generated by mechanical or electronic oscillators (eg a synthesizer), or by acoustically generated vibrations that require electrical amplification (eg the electric guitar).
A fifth class of musical instrument has been added: electrophones, in which the sound is produced by electromagnets, oscillators, or other non-acoustic devices.
It can be debated whether the pipe organ (which uses electric key action to control solenoid valves) is an electrophone or an aerophone.

SMART Vocabulary: related words and phrases

Musical instruments
accordion
acoustically
aerophone
alphorn
alto
drum kit
drum machine
drumbeat
drumhead
drumroll
oud
over-pedal
panpipes
paradiddle
pedal steel
tuned
tuning fork
tuning peg
ukulele
unpitched

You can also find related words, phrases, and synonyms in the topics:

Amplifiers, microphones & speakers